Winona, MN
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Winona in Minnesota · Population: 49,705
TRI sites such as Alliant Castings; Peerless Chain Co; Cytec Engineered Materials Inc; SDWIS systems such as Winona; Goodview; Saint Charles anchor Winona, MN's EPA extract. Derived burden score 39/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Winona include Winona; Lewiston; Rollingstone, while Alliant Castings leads reported TRI pounds among local Form R filers. AQS median AQI 20 / peak 63 in 2024.
Burden score 39/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Winona -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Winona, MN: EPA TRI 2023 reporting year
Same facilities, both years
+36.9%
12 facilities that filed in 2022 and 2023
Whole inventory
+36.9%
50.6 thousand lb → 69.3 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Winona, MN's total reported releases rose from 50.6 thousand lb in 2022 to 69.3 thousand lb in 2023, based on EPA TRI filings.
- Winona, MN's off-site transfers rose from 24.8 thousand lb in 2022 to 47.4 thousand lb in 2023, based on EPA TRI filings.
- Winona, MN's air releases fell from 25.6 thousand lb in 2022 to 21.6 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 114 (93%) | 8 | 0 | 63 |
| 2023 | 95 (80%) | 22 | 1 | 169 |
| 2022 | 113 (93%) | 8 | 0 | 65 |
| 2021 | 101 (87%) | 15 | 0 | 80 |
| 2020 | 112 (94%) | 7 | 0 | 57 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Minnesota, see the EPA's AirNow.gov.
Water Systems (11)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| Winona | 27,782 | 8 |
| Goodview | 4,158 | 0 |
| Saint Charles | 3,825 | 0 |
| Lewiston | 1,512 | 9 |
| Rollingstone | 664 | 1 |
| Altura | 493 | 0 |
| Hidden Valley Mobile Home Park | 464 | 0 |
| Utica | 293 | 1 |
| Elba | 146 | 0 |
| Green Terrace Mobile Estates | 86 | 0 |
| Bethany Water Company | 60 | 0 |
TRI Facilities (16)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Alliant Castings | 114.2K lbs |
| 2 | Peerless Chain Co | 107.9K lbs |
| 3 | Cytec Engineered Materials Inc | 82.0K lbs |
| 4 | Midwest Metal Products Inc | 20.0K lbs |
| 5 | Miller Waste Mills (dba Rtp Co.) | 14.0K lbs |
| 6 | Miller Waste Mills DBA Rtp Co | 4.1K lbs |
| 7 | We-No-Nah Canoe Inc | 4.0K lbs |
| 8 | Badger Foundry Co | 3.8K lbs |
| 9 | Bcs-Ais-Machine Building Div | 56 lbs |
| 10 | Bcs Automotive Interface Solutions | 2 lbs |
| 11 | Benchmark | 1 lbs |
| 12 | Riverside Electronics Ltd | 0 lbs |
| 13 | Willet Hauser Architectural Glass | 0 lbs |
| 14 | Miller Felpax Corp | 0 lbs |
| 15 | Watlow | 0 lbs |
| 16 | Spensall a Div of Fastenal Manufacturing | 0 lbs |
Cities in Winona (8)
Frequently Asked Questions
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What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.